Cordon – open-source security gateway for MCP tool calls

Show HN: Cordon – open-source security gateway for MCP tool calls

Cordon – open-source security gateway for MCP tool calls is a company in show hn launch.

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MCP gives AI agents access to real tools — databases, filesystems, APIs. There's no built-in way to say "require human approval before any write" or "this tool is never allowed, ever."Cordon is a stdio proxy that sits between Claude Desktop and your MCP servers. Every tool call flows through a policy engine before it reaches the upstream server.Policies per server or per tool: allow, block, approve, approve-writes, read-only, log-only. Write detection by tool name prefix — drop_table gets caught, read_data passes through automatically.When a tool call needs approval, Cordon pauses and prompts in the terminal. For teams, it can route approvals to a Slack channel instead — the agent waits, a h

The company sits in the show hn launch segment, where it competes on its core product or service.

Its current recorded stage is Show HN launch.

Website: cordon-server-production.up.railway.app/dashboard